Design of Broadband Compact Canonical Triple-Sleeve Antenna Operating in UHF Band

Abstract

In this paper, a novel compact broadband antenna at UHF frequencies is presented with canonical shapes. Hemispherical, conical and cylindrical shapes have all been considered for antenna configuration. The designed antenna provides an instantaneous frequency range from 370 to 5,000 MHz with omnidirectional characteristics. The antenna was simulated in CST Microwave Studio, fabricated and evaluated; the results are presented. The simulated and measurement results are in good agreement. The antenna has voltage standing wave ratio (VSWR) ≤ 1.9:1 in 400–570 MHz, 2,530–3,740 MHz and 4,180–4,620 MHz; it has VSWR ≤ 3:1 over the operating frequency range 370–5,000 MHz and the measured gain varies from -0.6 to 4.5 dBi over the frequency band. The concept of canonical-shaped antenna elements and the incorporation of triple sleeves resulted in a reduction of the length of the antenna by 62% compared to the length of a half-wave dipole antenna designed at the lowest frequency. The antenna can be used for trans-receiving applications in wireless communication.

Design of a Wideband Printed Patch Dipole Antenna with a Balanced On-Board Feeding Network

“…In particular, the wide impedance-matching characteristics of dipole antennas are essential for operating multifunctional systems, and their directive radiation patterns are important for stably maintaining point-to-point communication links. To obtain wideband characteristics, 3D dipole antennas have been investigated using a biconical structure [7,8], an additional parasitic element [9], and an indirect feeding structure [10]. However, these studies have difficulties with high integration into systems due to the bulky structure size and nondirective radiation patterns.…”

A Circular Sector-Shaped Dipole Antenna with Meandered Arms and Added Ferrite-Loaded Artificial Magnetic Conductor

“…Thus, it is unsuitable to mount an antenna operating in HF, VHF, and UHF bands on an application, such as a ground vehicle, which is smaller than the wavelength of the operating frequency. Consequently, a study on electrically small antennas (ESAs) operating in HF, VHF, and UHF bands has been conducted [2][3][4][5][6]. Although the proposed antennas are miniaturized enough to be mounted on a ground vehicle, they have narrow operating bandwidth characteristics because of the high Q value of the ESA [7].…”